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All Patents in class 451/374
Patents 31 - 41 of 41
First set of recordsPrevious set of recordsLast set of records
1,917,504Jul. 11, 1933F.W. CurtisCutter Grindersharpening machines
2,002,971May 28, 1935H.W. ZimmermanReamer sharpenerreamers
2,118,912May 31, 1938J.B. ArmitageCutter Grindertool grinders
2,118,967May 31, 1938F.W. CurtisCutter grindertool grinders
2,549,147Apr. 17, 1951B.G. WaltersPortable knife grinder for woodworking machinessharpening machines
2,560,967Jul. 17, 1951F. LohutkoApparatus for Grinding Gears and Gear Cuttersgrinding attachments
2,578,884Dec. 18, 1951L.C. HammondWork holder for grinding router bits
2,617,237Nov. 11, 1952E.P. SacreyCutter head sharpening attachmenthandheld routers
2,725,690Dec. 06, 1955W.F. FrenchCutter grinding mandrel with tooth rest
2,785,591Mar. 19, 1957V.H. HildebrantSaw grinding machinewoodworking machine sharpening mechanisms
3,073,076Jan. 15, 1963W.F. FrenchRadius cutter grinding machine
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